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Too much manual fixing.

potat0e
I have a design that's very low in util ~40%, 3 metal process. But after I optDesign postCTS setup and hold, the violations path are always "swinging" between the 2 different switches. When I optDesign -hold, the setup violations get worst, the option to allow fixing hold and violating setup was set to false. The numbers of violated paths didn't get less. I had to manually fix the violations by hand, adding buffers, upsizing cells. Basically doing what the tool should be doing. What could have being possible wrong? Timing constraints, placement, floorplan, etc?
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  • Running in multimode means that instead of checking for discrepancies within a single set of constraints, you will have to check between all sets of constraints that are used in the multimode. I would say that running multimode makes it more likely that there is a conflict in the constraints between different modes.

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  • Running in multimode means that instead of checking for discrepancies within a single set of constraints, you will have to check between all sets of constraints that are used in the multimode. I would say that running multimode makes it more likely that there is a conflict in the constraints between different modes.

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